package net.minecraft.world.level.levelgen;

import java.util.concurrent.atomic.AtomicLong;
import net.minecraft.util.RandomSource;

@Deprecated
public class ThreadSafeLegacyRandomSource implements BitRandomSource {
	private static final int MODULUS_BITS = 48;
	private static final long MODULUS_MASK = 281474976710655L;
	private static final long MULTIPLIER = 25214903917L;
	private static final long INCREMENT = 11L;
	private final AtomicLong seed = new AtomicLong();
	private final MarsagliaPolarGaussian gaussianSource = new MarsagliaPolarGaussian(this);

	public ThreadSafeLegacyRandomSource(final long seed) {
		this.setSeed(seed);
	}

	@Override
	public RandomSource fork() {
		return new ThreadSafeLegacyRandomSource(this.nextLong());
	}

	@Override
	public PositionalRandomFactory forkPositional() {
		return new LegacyRandomSource.LegacyPositionalRandomFactory(this.nextLong());
	}

	@Override
	public void setSeed(final long seed) {
		this.seed.set((seed ^ 25214903917L) & 281474976710655L);
	}

	@Override
	public int next(final int bits) {
		long oldSeed;
		long nextSeed;
		do {
			oldSeed = this.seed.get();
			nextSeed = oldSeed * 25214903917L + 11L & 281474976710655L;
		} while (!this.seed.compareAndSet(oldSeed, nextSeed));

		return (int)(nextSeed >>> 48 - bits);
	}

	@Override
	public double nextGaussian() {
		return this.gaussianSource.nextGaussian();
	}
}